Just ran across this today:
http://www.who.int/features/qa/zika-pregnancy/en/
"Zika virus has been detected in breast milk but there is currently no evidence that the virus is transmitted to babies though breastfeeding. Current WHO breastfeeding recommendations remain valid, in particular exclusive breastfeeding for the first 6 months of life."

If I understand correctly, the biggest potential threat is to the unborn baby if a pregnant mom contracts the virus. And the earlier in pregnancy, the more dangerous to the developing fetus. Otherwise, for adults, symptoms of infection are usually mild and most people recover. Complications are rare on a population level. 

Experts aren't sure if Zika can be passed mom to baby during childbirth, and hence what the repercussions of that would be. This source says that experts believe "if a baby contracts Zika virus after being born, it may appear similar to illness in adults", though I can't locate the original source for that information. https://www.romper.com/p/can-zika-virus-harm-babies-after-theyre-born-its-officially-a-global-emergency-4886

I think there's just not much known yet about Zika and birth / breastfeeding - which is surprising since Zika is not a new discovery (it's been present in Africa and Asia for 50 years).

Here's another article I found helpful:
http://www.nytimes.com/interactive/2016/health/what-is-zika-virus.html?_r=0

no answers, just time on my hands today to dig around on the Internet ...

Kindly,
Michelle

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